Blindstitch sewing-machine.



L. ONDERDONK.

Y BLINDSTITGH SEWING MACHINE.

' APPLICATION FILED 1120.6, 1907.

1,132,60. i Patent6a1v1ar.23,1915.

-3 SHEETS-SHEET 1.

WITNESSES" v u l NVENTOR Affari/cys L. ONDERDONK.

' BLINDSTITGH SEWING MACHINE.

APPLICATION FILED 15H0. e, 1907.

1,1 32,680, Patented Mar. 23, 1915 3 SHEETS-SHEET 2.

abtofowzv L. ONDERDONK.

BLINDSTITGH SEWING MACHINE. y APPLICATION FILED DEC. 6, 1907. A 1,132,680, f Patented Mar. ,23, 1915.

3 SHEETS-SHEET 3l v y! I llill@ nm 66 W K J9 Mmmm N 4 25 im. Z6

32 Jol Z4 LANSING oNnERnoNK, or NEW Yonk, N. Y., AssIGNoR To nNIoNSPECIAL :MACHINE COMPANY, or CHICAGO, ILLINoIs,

A CORPORATION 0F ILLINOISA BLrNns'rITcH snwrNG-MAcHgNE.

T0 all whom z't may Gomera."

Be it known that I, LANSING-ONDERDONK, a citizen of the United States,residing at New York city, in the county of New York,

State of New York, have invented certainl new and useful Improvements inBlindstitch Sewing-Machines, of which the following 1s a description',reference being vhad to the accompanying drawing and to the letters andfigures of reference marked thereon. v

My'invent'ion relates "to new and useful improvements 'in blind stitchsewing machines, and has for its object to provide a feeding mechanismwhich shallrbe eiicient in operation. I

A further object of my invention is to provide means for raising andlowering the work supporting memberand/ for adjusting the normaloperative position of the same.

Still further objects of my invention will in part be'obvious and willin part be hereinafter more fully disclosed. v 1

In the drawings which vshow by way of illustration one 'embodiment' ofmy lnvention Figure 1 is a-front-view partly in section, of a sewingmachine'provided wlth my improvements. Fig. 2 is a sectional viewshowing the feed disk and the members for operating the same. Fig. 3 isa horizontal sectional view showing the toggle links forcontrolling the`work. support. Fig. 4 isa detail view showing the feed shaft and the Ifriction feed therefor.4

The base 1 has rising therefrom the usual standard 2, carrying anoverhanging arm 3 at the forward end of which is the needle head 4. Theneedle 5 is carried by a needle lever 6 pivoted at 7 to the overhangingarm.

Said needle lever receives its oscillation through a link 8, which ispivoted to a rock lever 9, mounted on the standard of the machine.l Saidrockshaft 9 receives its oscillation from an eccentric 10 on the mainshaft 11, through a rod or pitman 12. The main shaft 11 is rotated bytheusual belt wheel 13, The complemental stitch forming mechanismcoperating with the needle has been omitted from the drawings for the`sake of clearness, and for'the reason that it forms no part of theinvention. The base 1 has' a work supporting arm 14,-extending throughan opening 15 in the standard and pivoted therein by a pivot bolt 16.The feed shaft 17 1s mounted in bearings Specification of LettersPatent. i

wheel 20- at its outer end,

lgrip the iange orring of the 18 and 19 formed in the work'supportingarm. Said feed shaft 17 carries a feed through an opening formed in thework supportlng arm. vlded with an intermediate crimping ridge 21, andwith feed teeth 22 and 23 located upon opposite `sides of the crimpingridge 2 1. The feed shaft 17 carries a clampmg rlng or 'ange 24, 'at itsinner end. Said feed shaft also carries a central' stud 25 on v.which isloosely mounted a collar 26, see Fig. 4. Said collar 26 has `an arm' 27rigidly secured thereto and as said arm 27 is oscillated, said' collar26 .will also be oscilylated about the'stud 25. Said collar 26 is alllsoprovided with Ioutwardly .extending s ort within the overhanging ring or4flange 24.

The gripping plates 29, 29, 29, are each provided with a slot whichengages overthe ring or flange '24 and said slots' are normally of sucha width that the ring or flange will-turn freely in the slots formed inthe gripping plates. -When, however, the gripping plates are slightlytilted, they will grip 'the r1ngorf1ange24, and cause the same to movetherewith. The gripping plates are seated at .their inner end in'recesses 30 formed in the collar 26.

. The springs 31 are secured to the short arms 28 and bear `against vthegripping plate, normally tending to'hold said gripping plates toward theshort arms 28. When the collar 26'is turned in a clockwise direc-y tion,as viewed in Fig. 4, the grip ing plates feed shaft, and move the sametherewith. When however, the collar 26 is moved in the opposite platesto assume a position so that the gripping-plates will slide freely onthe ring or ange and the shaft will not be moved. l

- I have provided a bracket 32, which is secured to the overhanging arm,and a grip-7 f pivoted to a stud adjustably secured in a segment slotformed in the arm 36. The

Patented Mar. L23, 1915. Application filed lftecember, 1907. Serial No.405,357. I

which extends i armsl 28, 28, 28, whichare .disposed Said feed wheel 20is proi z5 f A direction, the springs allow the gripping 4 shaft rotatestherefore, the feed shaft will I i held against arm 36 is secured to ashaft 37 which is mounted'in lugs 38 carried by the standard of themachine. 'lhe shaft 37 is oscillated by thelarm 39, which is pivoted toalink 40. 'llhe link 40 coperates with -an eccentric 41 mounted on themain shaft 11.A As the mainbe given an intermediate rotation which maybe properly timed to present the material'to the stitching 'mechanism.`By adjusting the connection between the link and the arm 36, l amthereby able `to vary the length of the stitch. rlhe material is presserlmembers 42 and 43, which are pivoted Ato the overhanging arm, andyieldlingly held in Contact with vthe crimping ridge by means of thesprings 44, 45.

'llhe work supporting arm is provided with the downwardly extendingflange or lug 46. Said flange carries near its lower end a stud 47having which is pivoted one end of the link 48. rllhe link 48 in itsopposite end is pivoted in the bifurcated end of a link 49 by means of apivot 50. The link 49 is rigidly secured to a shaft 5l which 1s mountedin a bearing 52 and carries on its outer end a hand lever 53. i Thebearing 52 is mounted in a slot 54 in the standard, and is securedinplace by a nut 55. The link 48 is also provided with a lip j or. lug56 which contacts with theslink 49' when the parts'are in the positionshown in c Fig. l. ln lthis position the pivotal connec-A tion betweenthe links 48 and A49 is slightly above a line joiningthe pivotal con-ynection of the link 48 with the stud 47, and the center of the shaft 51.rlhe work supporting arm therefore will be held in its raised positionby the toggle' links. When yit is desired to adjust the position of thecrimping ridge relative to the needle, the locking nut is loosened andthe adjusting screw 57 .is turned. Said adjusting screw 57 is threadedat itsv inner end into a lug 58 carried by thevb'earing 52, and isprovided at its outer end with a collar 59 which is held in a seat inthe bed plate by means of `one direction,

the work support will be yraised or lowered.

'a plaeo. y Vthat as the adjusting screw 57 is turned in or the other,the front end of By the arrangement above described,the lwork-supportingarm 4may be swung on its pivot to lower or raise it v to the properheight to adjust the crimpingridge with respect to the needle, andalsolto swing* it to allow of insertion and removal of the work.

Having thus particularly described my invention, what l claim as :newand desire to secure by Letters Patent, is

1. The combination with an overhanging arm, of a needle Vcarriedthereby,a work supporting arm, means for raising and lowering said worksupporting arm, and for holding the crimping ridge by the ing andlowering said work supporting arm .relatlve to said needle, and meansspaced ears between.

1 lt will be apparent therefore,

for adjusting the position of said toggle lever.

4. rlllhe combination with a standard, a needle supported by saidstandard, a work supporting arm pivoted to said standard and movablerelative to said needle, a link pivoted to said arm, a second linkpivoted to said rst named link and to the standard, and a lug forlimiting the movement of said linksl and for holding the work supportingarm in raised position.

5. rllhe combination with a Standard, a needle supported by saidstandard of a work supporting arm pivoted' to said standard and movablerelative to said needle, a link pivoted to said arm, a second linkpivoted to said first named link and to the standard and a lug forlimiting the movement of Jsaid links and for holding the work supporting1 -arm in raised position, and means for ad- 10 justing the position ofthe pivotal connection between' the' second link and Afthe standard. y

i 6. The combination with a`v standard, a needle supported by saidstandard, of a work supporting arm pivoted to said standard and movablerelative to said needle, a link pivoted to said arm, a second linkpivoted to said irstfnamed link and to the standard,

a lug forlimiting the movement of said links and for holding the worksupporting arm yin raised position, an adjusting screw mounted in lsaidstandard and engaging` the pivot bearing of the second link whereby-theposition of the work supporting arm may be adjusted. y

7. rll`he combination ofa standard, a needle supported by said standard,a `work supporting arm pivoted to said standard and movable relative tosaid needle, a" link pivoted to said work supporting arm, a second linkpivoted to said first link and to a shaft mounted in a bearing carriedby the standard and a hand lever connected to said shaft.

8. The .combinationv of a standard, a needle supported by said standard,a work supporting arm pivoted to said standard and movable relative tosaid needle, a link pivoted to said work supporting arm, a second linkpivoted to said first link and to a shaft mounted in a bearingcarried'by the standard, and a hand lever connected to said shaft, anadjusting screw mounted in sald 'standard and connected to the bearingcarto said toggle lever, an adjustable bearing for said shaft, a handlever connected to said shaft and an adjusting screw for adjusting theposition of said bearing.

10. The combination wlth an overhanging arm, of a needle carriedthereby, a pivoted work supporting arm, means for raising and loweringsaid worl supporting arm and for holding the same rigidly in raisedposition, said raising and lowering means being attached at a point awayfrom the outer end of the work supporting arm and means for adjustingtheposition of the work-supporting arm relative to the needle.

1l. The combination of an overhanging arm, a needle carried thereby,said needleat the stitching point moving into and out of the materialatpoints which are in substantially a horizontal line, a movable worksupport beneath the needle, means for raising a'nd lowering the worksupport to permit the insertion of the material o ver the work sup'-port for engagement by the needle, and means coperating `with saidraising and lowering means for positivelyl moving said.

work support toward and from the needle to position the same relative tothe needle when in normal operative relation to the needle.

In testimony whereof I aix mysignature, I

in presence of-tvvo witnesses.

` LANSING ONDERDONK.

Witnessesz l R. S. OswALD, .WAnrnR HAR'rmY.

